Foo Fighters frontman Dave Grohl "still dreams" about playing in Nirvana and admits he wouldn't "feel comfortable" singing a song that the late Kurt Cobain sang.

The 51-year-old rocker, who was the drummer in Nirvana until Cobain's tragic death in 1994, said he only ever plays the group's tracks live with former bandmates Krist Novoselic, Pat Smear and guest vocalists like Joan Jett, Sonic Youth's Kim Gordon and St. Vincent's Annie Clark.

Speaking to Classic Rock magazine, Grohl said: "I wouldn't feel comfortable singing a song that Kurt sang. I feel perfectly at home playing those songs on the drums. And I love playing them with Krist and Pat and another vocalist.

"I still have dreams that we're in Nirvana, that we're still a band. I still dream there's an empty arena waiting for us to play.

"But I don't sit down at home and run through Smells Like Teen Spirit by myself. It's just a reminder that the person who is responsible for those beautiful songs is no longer with us. It's bittersweet."

Nirvana at the MTV Video Music Awards with their Moonman for best alternative video In Bloom. Left to right: Kris Novoselik, Dave Grohl, Kurt Cobain and the video's director Kevin Kerslake

Opening up about the Foo Fighters' upcoming 10th studio album Medicine at Midnight, which has been described as a party record, Grohl said fans "will bounce around for three hours" when the band eventually gets to play it live.

"I thought rather than overcomplicate things and try to make this riffy prog record, which is a type of music we love, let's simplify everything and make the choruses bigger and the grooves fatter and the tempos more up, so people will bounce around for three hours when we eventually get to play it live."

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